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A GPS disciplined oscillator unit with a GPS antenna input, 10 MHz and 1 pulse-per-second (PPS) outputs, and an RS-232 interface.. A GPS clock, or GPS disciplined oscillator (GPSDO), is a combination of a GPS receiver and a high-quality, stable oscillator such as a quartz or rubidium oscillator whose output is controlled to agree with the signals broadcast by GPS or other GNSS satellites.
In addition to its use in navigation, the Global Positioning System (GPS) can also be used for clock synchronization. The accuracy of GPS time signals is ±10 nanoseconds. [8] Using GPS (or other satellite navigation systems) for synchronization requires a receiver connected to an antenna with unobstructed view of the sky.
PPS signals are used for precise timekeeping and time measurement. One increasingly common use is in computer timekeeping, including NTP.Because GPS is considered a stratum-0 source, a common use for the PPS signal is to connect it to a PC using a low-latency, low-jitter wire connection and allow a program to synchronize to it.
Clock synchronization: the accuracy of GPS time signals (±10 ns) [114] is second only to the atomic clocks they are based on, and is used in applications such as GPS disciplined oscillators. Disaster relief/emergency services: many emergency services depend upon GPS for location and timing capabilities.
IEEE 1588v2 PTP GPS Master & Slave clocks from Masterclock [69] IEEE 1588v2 PTP GPS Master & Slave clocks from Tekron [70] IEEE 1588v2 PTP GPS Smartgrid clocks from Tekron [70] IPITEK MSP-1588 [71] Open Time Server : 1GbE, Rubidium IEEE 1588 PTP, NTP, SyncE, PPS GNSS grandmaster clock from Timebeat.app [72]
Manual sync only. NIST Automated Computer Time Service (ACTS) [27] +1-303-494-4774 +1-808-335-4721; Windows computer with dialup modem. ntpd with NIST/USNO/PTB Modem Time Services driver; ClockWatch Pro for Windows [22] USNO Master Clock modem time [28] +1-202-762-1594 Computer with Bell 212A or CCITT V.22 compatible modem US Naval Observatory ...
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